Quarterly report pursuant to Section 13 or 15(d)

Revenue (Narrative) (Details)

v3.19.2
Revenue (Narrative) (Details) - USD ($)
3 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Apr. 30, 2019
Disaggregation of Revenue [Line Items]      
Deferred revenue $ 2,681,037   $ 2,456,865
Refunds due students $ 1,591,632   $ 1,174,501
Sales Revenue, Net [Member] | Non-US [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of revenues from students outside the United States 1.48% 1.90%